[PATCH 2/2] ASoC: meson: axg-fifo: convert Amlogic FIFO controller to yaml

[Alexander Stein]

Convert Amlogic FIFO controller documentation to yaml format.

Signed-off-by: Alexander Stein <alexander.stein at mailbox.org>
---
Things to note:
First of, Jerome, sorry for adding you as maintainer, but
1) it's mandatory
2) your are the (only) author of amlogic,axg-fifo.txt

Please add your Signed-off-by if that is okay with you.

License is mandated by checkpath, not my choice.

I'm not so sure about the compatible check. Essentially it is either
* 'amlogic,axg-frddr' OR
* 'amlogic,g12a-frddr' + 'amlogic,axg-frddr'
  (or 'sm1' instead of 'g12a')

Same goes for *-toddr. Is this schema correct in that regard? At least I
got no warnings on existing device trees.

 .../bindings/sound/amlogic,axg-fifo.txt       | 34 -------
 .../bindings/sound/amlogic,axg-fifo.yaml      | 97 +++++++++++++++++++
 2 files changed, 97 insertions(+), 34 deletions(-)
 delete mode 100644 Documentation/devicetree/bindings/sound/amlogic,axg-fifo.txt
 create mode 100644 Documentation/devicetree/bindings/sound/amlogic,axg-fifo.yaml

diff --git a/Documentation/devicetree/bindings/sound/amlogic,axg-fifo.txt b/Documentation/devicetree/bindings/sound/amlogic,axg-fifo.txt
deleted file mode 100644
index fa4545ed81ca..000000000000
--- a/Documentation/devicetree/bindings/sound/amlogic,axg-fifo.txt
+++ /dev/null
@@ -1,34 +0,0 @@
-* Amlogic Audio FIFO controllers
-
-Required properties:
-- compatible: 'amlogic,axg-toddr' or
-	      'amlogic,axg-toddr' or
-	      'amlogic,g12a-frddr' or
-	      'amlogic,g12a-toddr' or
-	      'amlogic,sm1-frddr' or
-	      'amlogic,sm1-toddr'
-- reg: physical base address of the controller and length of memory
-       mapped region.
-- interrupts: interrupt specifier for the fifo.
-- clocks: phandle to the fifo peripheral clock provided by the audio
-	  clock controller.
-- resets: list of reset phandle, one for each entry reset-names.
-- reset-names: should contain the following:
-  * "arb" : memory ARB line (required)
-  * "rst" : dedicated device reset line (optional)
-- #sound-dai-cells: must be 0.
-- amlogic,fifo-depth: The size of the controller's fifo in bytes. This
-  		      is useful for determining certain configuration such
-		      as the flush threshold of the fifo
-
-Example of FRDDR A on the A113 SoC:
-
-frddr_a: audio-controller at 1c0 {
-	compatible = "amlogic,axg-frddr";
-	reg = <0x0 0x1c0 0x0 0x1c>;
-	#sound-dai-cells = <0>;
-	interrupts = <GIC_SPI 88 IRQ_TYPE_EDGE_RISING>;
-	clocks = <&clkc_audio AUD_CLKID_FRDDR_A>;
-	resets = <&arb AXG_ARB_FRDDR_A>;
-	fifo-depth = <512>;
-};
diff --git a/Documentation/devicetree/bindings/sound/amlogic,axg-fifo.yaml b/Documentation/devicetree/bindings/sound/amlogic,axg-fifo.yaml
new file mode 100644
index 000000000000..54bc073591f4
--- /dev/null
+++ b/Documentation/devicetree/bindings/sound/amlogic,axg-fifo.yaml
@@ -0,0 +1,97 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/sound/amlogic,axg-fifo.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Amlogic Audio FIFO controllers
+
+maintainers:
+  - Jerome Brunet <jbrunet at baylibre.com>
+
+allOf:
+  - $ref: name-prefix.yaml#
+
+properties:
+  $nodename:
+    pattern: "^audio-controller at .*"
+
+  "#sound-dai-cells":
+    const: 0
+
+  compatible:
+    oneOf:
+      - items:
+          - enum:
+              - amlogic,g12a-frddr
+              - amlogic,sm1-frddr
+          - const: amlogic,axg-frddr
+      - const: amlogic,axg-frddr
+      - items:
+          - enum:
+              - amlogic,g12a-toddr
+              - amlogic,sm1-toddr
+          - const: amlogic,axg-toddr
+      - const: amlogic,axg-toddr
+
+  reg:
+    items:
+      - description: physical base address of the controller
+
+  interrupts:
+    items:
+      - description: FIFO interrupt
+
+  clocks:
+    items:
+      - description: FIFO peripheral clock provided by the audio clock controller
+
+  resets:
+    minItems: 1
+    items:
+      - description: memory ARB line
+      - description: optional device reset line
+
+  reset-names:
+    minItems: 1
+    items:
+      - const: arb
+      - const: rst
+
+  amlogic,fifo-depth:
+    description: >
+      The size of the controller's fifo in bytes. This
+      is useful for determining certain configuration such
+      as the flush threshold of the fifo
+    $ref: /schemas/types.yaml#/definitions/uint32
+
+  sound-name-prefix: true
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - clocks
+  - resets
+  - reset-names
+  - '#sound-dai-cells'
+  - amlogic,fifo-depth
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/clock/axg-audio-clkc.h>
+    #include <dt-bindings/interrupt-controller/irq.h>
+    #include <dt-bindings/reset/amlogic,meson-axg-audio-arb.h>
+
+    frddr_a: audio-controller at 1c0 {
+        compatible = "amlogic,axg-frddr";
+        reg = <0x1c0 0x1c>;
+        #sound-dai-cells = <0>;
+        interrupts = <88 IRQ_TYPE_EDGE_RISING>;
+        clocks = <&clkc_audio AUD_CLKID_FRDDR_A>;
+        resets = <&arb AXG_ARB_FRDDR_A>;
+        reset-names = "arb";
+        amlogic,fifo-depth = <512>;
+    };
-- 
2.34.1